001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.squid.indexer;
021    
022    import org.sonar.squid.api.Query;
023    import org.sonar.squid.api.SourceCode;
024    
025    public class QueryByType implements Query {
026    
027      private final Class<? extends SourceCode> resourceType;
028    
029      public QueryByType(Class<? extends SourceCode> resourceType) {
030        if (resourceType == null) {
031          throw new IllegalStateException("The type of resource can't be null !");
032        }
033        this.resourceType = resourceType;
034      }
035    
036      public boolean match(SourceCode unit) {
037        return unit.isType(resourceType);
038      }
039    
040      @Override
041      public boolean equals(Object o) {
042        if (this == o) {
043          return true;
044        }
045        if (!(o instanceof QueryByType)) {
046          return false;
047        }
048    
049        QueryByType that = (QueryByType) o;
050    
051        if (resourceType != null ? !resourceType.equals(that.resourceType) : that.resourceType != null) {
052          return false;
053        }
054    
055        return true;
056      }
057    
058      @Override
059      public int hashCode() {
060        return resourceType != null ? resourceType.hashCode() : 0;
061      }
062    }